Are you ready for your next career challenge? Leidos has an opportunity for a seasoned System Administrator at Davis Monthan AFB, AZ. Candidates must possess a current TS/SCI security clearance in order to be considered. In this role you will be responsible for overseeing JWICS operations for all Wing and subordinate unit SCIFs on site. You will also be responsible for all Site-wide JWICS Command, Control, Communications, Computers, and Intelligence (C4I) and perform JWICS specific touch maintenance to install and maintain computers, servers, and all JWICS related software and hardware. (This also includes but is not limited to account management, network storage, local authentication servers, file servers, user privileges, local group policy, local software testing, restoration operations, contingency planning, and local backups.) Ensure security patching is completed and locally downloaded, and also push JAVA, NOTAMS, and TCNO patches the AF JWICS Enterprise is unable to perform remotely. Primary Responsibilities: Work directly with users at the site and liaise daily with the ESD and ESC AF to help resolve user and network related issues as well as maintain the integrity of the Site domain. Perform investigative administration operations in support of the Cyber Security Operations Center for malware, spyware, Trojans, or unauthorized software that gets detected on any device at the Site. The position is full time daily operation and may require after hours and weekend duty via on-call support. Work autonomously with minimal oversight as well as in conjunction with multiple personnel in the fulfillment of the individual employee’s functions. Must have the ability to gather facts and use effective analytical and evaluative methods to assess information, plan the sequence of actions necessary, make sound decisions and solve a variety of security problems. Thorough understanding of their respective po
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Role overview
Job description
The Defense Sector at Leidos is seeking a motivated TS/SCI cleared Network Administrator to support the installation, configuration, and day-to-day management of enterprise network infrastructure. This role is an excellent opportunity for an early-career network professional to gain hands-on experience with routing and switching platforms, including Session Smart Router (SSR) / 128 Technology SD-WAN solutions, in a structured and security-conscious environment. The ideal candidate demonstrates a solid foundation in networking fundamentals, a willingness to learn vendor-specific technologies, and the discipline to operate within DoD network standards.
The job duties will be performed daily on site at Langley Air Force Base, VA.
Roles and Responsibilities:
Assist in the configuration, deployment, and ongoing management of routers, switches, and Session Smart Router (SSR) appliances across enterprise and edge network environments.
Support the design and implementation of routing policies, service policies, and traffic steering configurations on SSR/128 Technology platforms under senior engineer guidance.
Perform LAN switching administration — including VLAN configuration, spanning tree, trunking, and port security — on Juniper EX Series and/or Cisco Catalyst platforms.
Assist with the configuration and troubleshooting of routing protocols including OSPF and BGP (eBGP and iBGP) across enterprise WAN and data center environments.
Monitor network health, availability, latency, and throughput using network management tools; escalate anomalies and assist in root cause analysis.
Support configuration and maintenance of firewall rules, access control lists (ACLs), IPsec VPN tunnels, and other network security controls.
Execute software and firmware upgrades, patch management, and lifecycle maintenance activities for network devices in accordance with change management procedures.
Maintain accurate and up-to-date network diagrams, device inventories, and standard operating procedures (SOPs).
Coordinate with senior network engineers, system administrators, and security personnel to resolve network incidents and support planned infrastructure changes.
Participate in on-call rotation and assist with troubleshooting during network outages or degraded service events.
Basic Qualifications:
Bachelor's degree with 2+ years of experience or a Master’s degree with 1+ years of experience. Additional years of experience may be considered in lieu of degree.
Must have at least an active Top Secret clearance and the ability to obtain a SCI prior to your start date.
DoD 8570/8140-compliant certification at IAT Level II - CompTIA Security+ CE required at minimum.
Demonstrated understanding of OSI model, TCP/IP, subnetting, VLANs, routing protocols (BGP, OSPF, static routing), and WAN technologies.
Practical experience with LAN switching concepts on Juniper EX Series or Cisco Catalyst platforms, including VLANs, STP, and trunking.
Strong analytical and troubleshooting mindset, clear written and verbal communication, and the ability to work effectively in a team environment under supervision.
Preferred Qualifications:
Juniper Networks Certified Associate (JNCIA-Junos) or progress toward JNCIS-ENT; Juniper SSR-specific training or certification a strong plus or Cisco CCNA.
Familiarity with Border Gateway Protocol — including eBGP and iBGP concepts, peer configuration, route policies, and basic troubleshooting in a multi-site or service provider-adjacent environment.
Exposure to Juniper Session Smart Router (formerly 128 Technology) platforms, including familiarity with session-based routing, service and tenant models, or WAN traffic steering concepts.
Hands-on experience with advanced switching features such as RSTP/MSTP, LACP/LAG, Q-in-Q, or Layer 3 switching on either Juniper EX Series or Cisco Catalyst hardware.
Working knowledge of IPsec VPN configuration, zone-based firewall policies, or experience with Juniper SRX Series security platforms.
Basic familiarity with network automation tools or scripting (Python, Ansible, or Junos) for configuration management or compliance checks.
CompTIA Network+, or other vendor-neutral networking credentials demonstrating a broad networking foundation.
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If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:
September 22, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $59,150.00 - $106,925.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
What they are looking for
Skills & requirements
Qualification
Basic Qualifications: Bachelor's degree with 2+ years of experience or a Master’s degree with 1+ years of experience; Additional years of experience may be considered in lieu of degree; DoD 8570/8140-compliant certification at IAT Level II - CompTIA Security+ CE required at minimum; Preferred Qualifications: Juniper Networks Certified Associate (JNCIA-Junos) or progress toward JNCIS-ENT; Juniper SSR-specific training or certification a strong plus or Cisco CCNA
Hiring company
Leidos
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